Method of electric-arc heating and apparatus therefor.



Nd. 64l,767. Patented .Ian. 23, I900.

H. DBUSSE. f

METHOD DF ELECTBIG' ARC HEATING AND APPARATUS THEREFOR.

(Application filed Dec. 13, 1898.)

(No Model.)

ldmgss g grvmvm UNITED STATES PATENT OFFICE.

IIERMANN DROSSE, 0E BERLIN, GERMANY METHOD OF ELECTRIC-ARC HEATING ANDAPPARATUS THEREFOR.

SPECIFICATION forming part of Letters Patent No. 641,767, dated January23, 1900.

Application filed December 13,1898. Serial No. 699.178. model- To allu-lwm 1'! may (our-41":

lie it known that I, HERMAN); Danssli, a citizen of the Empire ofGermany, residing at Berlin, Germany, have invented certain new anduseful Improvements in )Iet-hodsof and Devices for Applying a Jet of Airor Gas to an Electric Arc, of which the following is a specification.

Irregularity in the consumption of electriclight carbons naturallycauses irregularity in the are between them. It becomes important tocompensate for this irregular action and to remedy the resulting defect.This I accomplish by. applying a blast of air or other gas to-the are bymeans which permit the direction of the blast to be varied at will asbecomes nccessary for the purpose stated. The said blast is also used tothin. and spread the flame of the are, and itsforcc may be regulated toincrease or decrease its action on the latter. w

One feature of the new process carried into practice by means of theimproved device consists in employing reducing-gas for blowing to doaway with the high oxidizing action of the are, which action is oftenvery objectionable for welding or soldering purposes, and the blast-gasmay be atmospheric air combined with burnable and unburnable gas, suchas lightin g-gas, hydrogen, acetylene,and certain hydrocarbons, which bythe high degree of heat of the electric are are decomposed into theircomponents, carbon and hydrogen, so as to have ahigh reducing action. Inthe same wayliquids containing carbon or hydrogen--sueh as petroleum,beuzin,and ligroin-are immediately reduced into gas and decomposed bythe flame.

The invention consists in the features of construction and combinationof parts hereinafter fully described and claimed.

In the accompanying drawings, Figure 1 is a side elevation of theimproved apparatus. Fig. 2'is a top plan view of same, the cover A,which is optional, being omitted; and Fig. 3 is a sectional-detail viewon line 1 2 of Fig. 1.

In the drawings like letters refer to like parts throughout all thefigures.

In the frame E of the mechanism a shaft G is journale'd, said shaftbeing actuated by hand-wheel G and carrying outside of the dependingparts of said frame two bevel gearwheels 2 and z", meshing withgear-wheels 2' and .2 respectively. These latter gear-wheels are mountedon threaded feedshafts s and s, respectively, the said shafts beingjournaled near their outer ends in bearings N, forming part of frame E,and at their inner ends in bearings N, integral with the lower end ofoutlet-flue (J, for the products of combustion. This flue is rigidlyattached to frame E and is wider than the latter to allow upward draft.The feed-shafts s and s are engaged by suitable feed-nuts F and F,carrying the carbonholdcrs and constructed as shown in Fig. 30f thedrawings. The feed-nuts are insulated from said feed-shafts. The carbonsor electrodes K-K' are inserted into longitudinally-. slit tubes R or Rand secured therein by clamps M )1, said tubes it R being held in clampsprovided on nuts F and F. This arrangement olfthe clcctrodes preventsthe same from being quickly consumed during the welding process, saidarrangement providing a larger surface to the passage of the .currentand leading the-latter near the points of the carbons. The air and gasare led to the electric are. produced between the ends of the carbons Kand K through blast-pipe c, terminating in a nozzle a, pivotallyattached to said pipe at e and secured to a handle-rod f, horizontallyextending therefrom and serving to give the'nozzle a any requiredposition for deviating the flame in any direction. The blast-pipe c hasat its upper part a cool; d for controlling the pressure of the fluid(gas or liquid) to obtain a more or less greater devia tion of theflame.

The current passes through the apparatus asfollows: from feed-wire Bthrough the flexible cable L to carbon-holder F and after production ofthe are to negative carbon-holder F through cable L and return-wire B.

The top part of the frame E may be provided with a hook or itsequivalent '1" forsuspending the apparatus to a movable carriage, andthe apparatus may'have a suitable handle D located near handle f andserving to move the apparatus as required. Furthermore, a cover A may beprovided on top of too the [ram as shown in Fig. 1, having a central pago. which forms an upward,extension of flue 0, making a continuous flueor passage. The central part of frame E is slotted at n, n, and itwithin the said due to al- 10W the passage of the blast-tube c and theattachment of the suspending-hook T as well as to facilitate the escapeof the products of combustion, and other modifications may be made inthe construction and arrangement of the various parts without departingfrom the scope of the invention,

Having fully described my inventiomwhat I claim, and desire to secure byLetters Paicnt, is-

1. In combination with the electric conductors and carbons forming anelectric arc, adjusting mechanism for the said carbons a blast-tube fordischarging air or gas against the arc, and adjusting devices forvarying at will the direction of the said tube and the blast issuingtherefrom, the said tube-adjust ing devices being independent of thecarbonad 5' usting' devices, in order that the blast may v be applied tothe are at different inclinations,

substantially as set forth. I

2. In an apparatus of the character described the combination with asuitable frame,

of suitable means for holding the electrodes and suitablemovement-transmission devices for controlling said electrodes inaccordance with the consumption, a chimney arranged at the center of theapparatus and connecting the parts of the frame, a blast-pipe extendingthrough said chimney and having a movable nozzle to permit the deviationof the electric arc in any required direction, substantially as setforth.

3. The method or process of assisting the action of the electric are onmetals and other materials consisting in directing a flow of liquidhydrocarbons or other liquid-reducing agents against and into theelectric arc,substantially as set forth.

In witness whereof I have hereunto signed my name, this 29th day ofNovember, 1898, in the presence of two witnesses.

HERMANN nsosss.

Witnesses:

ERWIN L. GoLDscH'mDr HENRY HASPER.

